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gpio: gpio-stmpe: make various char arrays static const, shrinks object size 

Don't populate the read-only arrays edge_det_values, rise_values and
fall_values on the stack but instead make them static and constify them.
Makes the object code smaller by over 240 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
   9525	   2520	    192	  12237	   2fcd	drivers/gpio/gpio-stmpe.o

After:
   text	   data	    bss	    dec	    hex	filename
   9025	   2776	    192	  11993	   2ed9	drivers/gpio/gpio-stmpe.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Colin Ian King 2017-11-28 18:23:39 +00:00 committed by Linus Walleij
parent deb2e713ba
commit e2843cb6cd
1 changed files with 15 additions and 9 deletions
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24
drivers/gpio/gpio-stmpe.c
View File

@ -273,15 +273,21 @@ static void stmpe_dbg_show_one(struct seq_file *s,
u8 fall_reg;
u8 irqen_reg;
char *edge_det_values[] = {"edge-inactive",
"edge-asserted",
"not-supported"};
char *rise_values[] = {"no-rising-edge-detection",
"rising-edge-detection",
"not-supported"};
char *fall_values[] = {"no-falling-edge-detection",
"falling-edge-detection",
"not-supported"};
static const char * const edge_det_values[] = {
"edge-inactive",
"edge-asserted",
"not-supported"
};
static const char * const rise_values[] = {
"no-rising-edge-detection",
"rising-edge-detection",
"not-supported"
};
static const char * const fall_values[] = {
"no-falling-edge-detection",
"falling-edge-detection",
"not-supported"
};
#define NOT_SUPPORTED_IDX 2
u8 edge_det = NOT_SUPPORTED_IDX;
u8 rise = NOT_SUPPORTED_IDX;